/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */
var MD5= {
	hexcase:0,	/* hex output format. 0 - lowercase; 1 - uppercase        */
	b64pad:'', /* base-64 pad character. "=" for strict RFC compliance   */
	chrsz:8,  /* bits per input character. 8 - ASCII; 16 - Unicode      */
	
	hex_md5:function(s){ return MD5.binl2hex(MD5.core_md5(MD5.str2binl(s), s.length * MD5.chrsz));},
 	b64_md5:function(s){ return MD5.binl2b64(MD5.core_md5(MD5.str2binl(s), s.length * MD5.chrsz));},
 	str_md5:function(s){ return MD5.binl2str(MD5.core_md5(MD5.str2binl(s), s.length * MD5.chrsz));},
 	hex_hmac_md5:function(key, data) { return MD5.binl2hex(MD5.core_hmac_md5(key, data)); },
 	b64_hmac_md5:function(key, data) { return MD5.binl2b64(MD5.core_hmac_md5(key, data)); },
 	str_hmac_md5:function(key, data) { return MD5.binl2str(MD5.core_hmac_md5(key, data)); },
 	md5_vm_test:function(){
 		return MD5.hex_md5('abc') == '900150983cd24fb0d6963f7d28e17f72';
 	},
 	core_md5:function(x, len){
 		/* append padding */
 		x[len >> 5] |= 0x80 << ((len) % 32);
 		x[(((len + 64) >>> 9) << 4) + 14] = len;
 		var a =  1732584193;
 		var b = -271733879;
 		var c = -1732584194;
 		var d =  271733878;
 		for(var i = 0; i < x.length; i += 16){
 			var olda = a;
 			var oldb = b;
 			var oldc = c;
 			var oldd = d;
 			a = MD5.md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
 			d = MD5.md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
 			c = MD5.md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
 			b = MD5.md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
 			a = MD5.md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
 			d = MD5.md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
 			c = MD5.md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
 			b = MD5.md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
 			a = MD5.md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
 			d = MD5.md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
 			c = MD5.md5_ff(c, d, a, b, x[i+10], 17, -42063);
 			b = MD5.md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
 			a = MD5.md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
 			d = MD5.md5_ff(d, a, b, c, x[i+13], 12, -40341101);
 			c = MD5.md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
 			b = MD5.md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

 			a = MD5.md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
 			d = MD5.md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
 			c = MD5.md5_gg(c, d, a, b, x[i+11], 14,  643717713);
 			b = MD5.md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
 			a = MD5.md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
 			d = MD5.md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
 			c = MD5.md5_gg(c, d, a, b, x[i+15], 14, -660478335);
 			b = MD5.md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
 			a = MD5.md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
 			d = MD5.md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
 			c = MD5.md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
 			b = MD5.md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
 			a = MD5.md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
 			d = MD5.md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
 			c = MD5.md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
 			b = MD5.md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

 			a = MD5.md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
 			d = MD5.md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
 			c = MD5.md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
 			b = MD5.md5_hh(b, c, d, a, x[i+14], 23, -35309556);
 			a = MD5.md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
 			d = MD5.md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
 			c = MD5.md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
 			b = MD5.md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
 			a = MD5.md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
 			d = MD5.md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
 			c = MD5.md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
 			b = MD5.md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
 			a = MD5.md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
 			d = MD5.md5_hh(d, a, b, c, x[i+12], 11, -421815835);
 			c = MD5.md5_hh(c, d, a, b, x[i+15], 16,  530742520);
 			b = MD5.md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

 			a = MD5.md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
 			d = MD5.md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
 			c = MD5.md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
 			b = MD5.md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
 			a = MD5.md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
 			d = MD5.md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
 			c = MD5.md5_ii(c, d, a, b, x[i+10], 15, -1051523);
 			b = MD5.md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
 			a = MD5.md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
 			d = MD5.md5_ii(d, a, b, c, x[i+15], 10, -30611744);
 			c = MD5.md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
 			b = MD5.md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
 			a = MD5.md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
 			d = MD5.md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
 			c = MD5.md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
 			b = MD5.md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

 			a = MD5.safe_add(a, olda);
 			b = MD5.safe_add(b, oldb);
 			c = MD5.safe_add(c, oldc);
 			d = MD5.safe_add(d, oldd);
 		}
 		return Array(a, b, c, d);
 	},
 	md5_cmn:function(q, a, b, x, s, t){
 		return MD5.safe_add(MD5.bit_rol(MD5.safe_add(MD5.safe_add(a, q), MD5.safe_add(x, t)), s),b);
 	},
 	md5_ff:function(a, b, c, d, x, s, t){
 		return MD5.md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
 	},
 	md5_gg:function(a, b, c, d, x, s, t){
 		return MD5.md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
 	},
 	md5_hh:function(a, b, c, d, x, s, t){
 		return MD5.md5_cmn(b ^ c ^ d, a, b, x, s, t);
 	},
 	md5_ii:function(a, b, c, d, x, s, t){
 		return MD5.md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
 	},
 	core_hmac_md5:function(key, data){
 		var bkey = MD5.str2binl(key);
 		if(bkey.length > 16) bkey = MD5.core_md5(bkey, key.length * MD5.chrsz);
 		var ipad = Array(16), opad = Array(16);
 		for(var i = 0; i < 16; i++){
 			ipad[i] = bkey[i] ^ 0x36363636;
 			opad[i] = bkey[i] ^ 0x5C5C5C5C;
 		}
 		var hash = MD5.core_md5(ipad.concat(MD5.str2binl(data)), 512 + data.length * MD5.chrsz);
 		return MD5.core_md5(opad.concat(hash), 512 + 128);
 	},
 	safe_add:function(x, y){
 		var lsw = (x & 0xFFFF) + (y & 0xFFFF);
 		var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
 		return (msw << 16) | (lsw & 0xFFFF);
 	},
 	bit_rol:function(num, cnt){
 		return (num << cnt) | (num >>> (32 - cnt));
 	},
 	str2binl:function(str){
 		var bin = Array();
 		var mask = (1 << MD5.chrsz) - 1;
 		for(var i = 0; i < str.length * MD5.chrsz; i += MD5.chrsz)
 			bin[i>>5] |= (str.charCodeAt(i / MD5.chrsz) & mask) << (i%32);
 		return bin;
 	},
 	binl2str:function(bin){
 		var str = '';
 		var mask = (1 << MD5.chrsz) - 1;
 		for(var i = 0; i < bin.length * 32; i += MD5.chrsz)
 			str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
 		return str;
 	},
 	binl2hex:function(binarray){
 		var hex_tab = MD5.hexcase ? '0123456789ABCDEF' : '0123456789abcdef';
 		var str = '';
 		for(var i = 0; i < binarray.length * 4; i++){
 			str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
 			hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
 		}
 		return str;
 	},
 	binl2b64:function(binarray){
 		var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
 		var str = '';
 		for(var i = 0; i < binarray.length * 4; i += 3){
 			var triplet = (((binarray[i   >> 2] >> 8 * ( i %4)) & 0xFF) << 16)
 			| (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
 			|  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
 			for(var j = 0; j < 4; j++){
 				if(i * 8 + j * 6 > binarray.length * 32) str += MD5.b64pad;
 				else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
 			}
 		}
 		return str;
 	}
}
